If you google "TrueNorth refeeding" or "TrueNorth breaking fast" you will find various links about the post-water-fast refeeding done by various folks who went on water fasts, including some for over a month. TrueNorth medically supervises water-only fasting. Although various sites will tell you that the re-feeding process is "very specific", or something vague like that, about the only thing that TrueNorth itself publishes about it that I have seen is that you must agree that the re-feeding period duration is half as long as your water fast was (15 days for a 30 day water fast).